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Finding the Fourth Proportional to 20,625.41, 30,938.11 and 7,477.79

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Solution

The fourth proportional to 20,625.41, 30,938.11 and 7,477.79 is: 11,216.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,625.41 : 30,938.11 = 7,477.79 : x
  2. Step 2: Convert to fraction form
    20,625.41/30,938.11 = 7,477.79/x
  3. Step 3: Cross multiply
    20,625.41x = 30,938.11 × 7,477.79
  4. Step 4: Simplify right side
    20,625.41x = 231,348,689.58
  5. Step 5: Solve for x
    x = 231,348,689.58/20,625.41
  6. Step 6: Final answer
    x = 11,216.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.